======Метод AstObjectCollection<AstExpression>.IndexOf(AstExpression)======
  * **Пространство имен:** [[developers:references:topomatic.crs.ast|Topomatic.Crs.Ast]]
  * **Сборка:** Topomatic.Crs (в Topomatic.Crs.dll)
=====Синтаксис=====
<code csharp>public override int IndexOf(AstExpression item)</code>
**Параметры**
  * //item//
    * Тип: [[developers:references:topomatic.crs.ast.astexpression|Topomatic.Crs.Ast.AstExpression]]

**Возвращаемое значение**
  * Тип: System.Int32